Journal
SCIENTIFIC REPORTS
Volume 6, Issue -, Pages -Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/srep22256
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Funding
- European Commission through the CALIPSO project under the EC [312284]
- BMBF [05K12CH4, 05K10KEB]
- Alexander von Humboldt Foundation, Germany
- Ramon y Cajal program [RYC-2013-14838]
- Marie Curie Career Integration Grant [PCIG12-GA-2013-618487]
- Ubbo Emmius Program at the University of Groningen
- U.S. Department of Energy [DE-AC02-76SF00515]
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Ultrashort flashes of THz light with low photon energies of a few meV, but strong electric or magnetic field transients have recently been employed to prepare various fascinating nonequilibrium states in matter. Here we present a new class of sources based on superradiant enhancement of radiation from relativistic electron bunches in a compact electron accelerator that we believe will revolutionize experiments in this field. Our prototype source generates high-field THz pulses at unprecedented quasicontinuous- wave repetition rates up to the MHz regime. We demonstrate parameters that exceed state-of-the-art laser-based sources by more than 2 orders of magnitude. The peak fields and the repetition rates are highly scalable and once fully operational this type of sources will routinely provide 1 MV/cm electric fields and 0.3 T magnetic fields at repetition rates of few 100 kHz. We benchmark the unique properties by performing a resonant coherent THz control experiment with few 10 fs resolution.
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